EP3022729A1 - Tileable display apparatus - Google Patents
Tileable display apparatusInfo
- Publication number
- EP3022729A1 EP3022729A1 EP14826645.5A EP14826645A EP3022729A1 EP 3022729 A1 EP3022729 A1 EP 3022729A1 EP 14826645 A EP14826645 A EP 14826645A EP 3022729 A1 EP3022729 A1 EP 3022729A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- display
- light sources
- array
- layer
- pixelets
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13336—Combining plural substrates to produce large-area displays, e.g. tiled displays
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133504—Diffusing, scattering, diffracting elements
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
Definitions
- This disclosure relates generally to displays, and in particular but not exclusively, relates to tileable displays.
- FIGs. 1A - 1C illustrate a display apparatus that includes a display layer disposed between a screen layer and an illumination layer, in accordance with an embodiment of the disclosure.
- FIG. 2 shows a semi-transparent plan view of a display apparatus looking through a screen layer to a display layer, in accordance with an embodiment of the disclosure.
- FIG. 3 shows more than one display apparatus tiled together to form a tiled display, in accordance with an embodiment of the disclosure.
- embodiment means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention.
- appearances of the phrases “in one embodiment” or “in an embodiment” in various places throughout this specification are not necessarily all referring to the same embodiment.
- particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
- FIGs. 1A - 1C illustrate a display apparatus 101 that includes a display layer 120 disposed between a screen layer 110 and an illumination layer 130, in accordance with an embodiment of the disclosure.
- FIG. 1A shows that illumination layer 130 includes an array light sources 131, 132, 133, 134, 135, and 136. Each light source in the array of light sources illuminates a corresponding pixelet to project the sub-image of the pixelet onto the screen layer 110 as a unified image.
- each pixelet includes a transmissive pixel array arranged in rows and columns (e.g. 100 pixels by 100 pixels).
- FIG. IB includes additional number references for the purpose of a more detailed discussion of display apparatus 101.
- FIG. IB also shows illumination layer 130 including light sources 131, 132, 133, 134, 135, and 136.
- each light source is disposed on a common plane of illumination layer 130.
- each light source is a laser.
- each light source is a light-emitting-diode (“LED") that emits light from a relatively small emission aperture.
- LEDs with an emission aperture of 150-300 microns may be used.
- the LED may emit white light.
- Other technologies may be used as light sources.
- each light source is an aperture emitting light from a light integration cavity shared by at least one other light source.
- Display layer 120 includes a matrix of pixelets 121, 122, 123, 124, 125, and 126.
- each pixelet in the matrix of pixelets is oriented on a common plane of display layer 120.
- the pixelets may be liquid-crystal-displays ("LCDs") that can be color LCDs or monochromatic LCDs.
- the pixelets may utilize other spatial light modulator technologies.
- each pixelet is an independent display array separated by spacing region 128 on display layer 120.
- each pixelet measures 20 x 20 mm.
- FIG. IB shows a 2 x 3 matrix of pixelets 121-126.
- each light source in the array of light sources has a one-to-one correspondence with a pixelet.
- light source 131 corresponds to pixelet 121
- light source 132 corresponds to pixelet 122
- light source 133 corresponds to pixelet 123
- each light source is centered under its respective corresponding pixelet.
- Each light source 131-136 is configured to emit a divergent projection beam 147 having a limited angular spread that is directed toward a specific corresponding pixelet in display layer 120, as illustrated in FIG. 1C.
- divergent projection beam 147 may be substantially shaped as a cone (circular aperture) or an inverted pyramid (rectangle/square aperture).
- Additional optics may be disposed over each light source in the array of light sources to define the limited angular spread (e.g. 20-70 degrees) and/or cross-sectional shape of divergent projection beam 147 emitted from the light sources.
- the additional optics may also increase brightness uniformity of the display light in divergent projection beam 147 so that the intensity of divergent projection beam 147 incident upon each pixel in a given pixelet is substantially similar.
- divergent projection beams 147 from different light sources may overlap upon the spacing region 128 on the backside of display layer 120.
- each pixelet is directly illuminated solely by one divergent projection beam from its corresponding light source, which may approximate a point source.
- a very small percentage of light from non-corresponding light sources may become indirectly incident upon a pixelet due to unabsorbed reflections of divergent projection beams 147 from the non-corresponding light sources.
- Spacing regions 128 and illumination layer 130 may be coated with light absorption coatings (that are known in the art) to decrease reflections from non-corresponding light sources from eventually becoming incident upon a pixelet that does not correspond with the light source.
- the limited angular spread of the light sources may be designed to ensure that divergent projection beams 147 only directly illuminates the pixelet that corresponds to a particular light source.
- conventional LCD technology utilizes lamps (e.g. LEDs or cold-cathode-fluorescents) with a generally Lambertian light distribution and diffusive filters in an attempt to generate uniform and diffuse light for backlighting an LCD panel.
- display layer 120 also includes spacing region 128 surrounding pixelets 121-126.
- pixelet 126 is adjacent to pixelets 123 and 125.
- Pixelet 126 is spaced by dimension 162 from pixelet 125 and spaced by dimension 164 from pixelet 123.
- Dimensions 162 and 164 may be considered “internal spacing” and are the same distance, in some embodiments.
- Pixelet 126 is also spaced by dimensions 161 and 163 from edges of display layer 120. Dimensions 161 and 163 may be considered “external spacing" and are the same distance, in some embodiments.
- dimensions 161 and 163 are half of the distance as dimensions 162 and 164. In one example, dimensions 161 and 163 are both 2 mm and dimensions 162 and 164 are both 4 mm. In the illustrated embodiment, the internal spacing between pixelets is substantially greater than the pixel pitch (space between pixels) of pixels included in each pixelet.
- Spacing region 128 contains a backplane region that includes pixel logic for driving the pixels in the pixelets.
- the backplane region is used for memory-in-pixel logic. Giving the pixels memory may allow each pixel to be refreshed individually instead of refreshing each pixel in a row at every refresh interval (e.g. 60 frames per second).
- the backplane region is used to assist in imaging processing. When display apparatus 101 is used in high-resolution large format displays, the additional image processing capacity will be useful for image signal processing, for example dividing an image into sub-images that are displayed by the pixelets.
- the backplane region is used to embed image sensors.
- the backplane region includes infrared image sensors for sensing 3D scene data in the display apparatus' environment.
- display light in a divergent projection beam 147 from a light source propagates toward its corresponding pixelet (e.g. pixelet 121).
- pixelet e.g. pixelet 121
- Each pixelet drives their pixels to display a sub-image on the pixelet so the display light that propagates through the pixelet includes the sub-image displayed by the pixelet.
- the light source generates the divergent projection beam 147 from a small aperture and the divergent projection beam 147 has a limited angular spread
- the sub-image in the display light gets larger as it gets further away from the pixelet. Therefore, when the display light (including the sub- image) encounters screen layer 110, a magnified version of the sub-image is projected onto a backside of screen layer 110.
- Screen layer 110 is offset from pixelets 121-126 by a fixed distance 166 to allow the sub-images to become larger as the display light (in divergent projection beams 147) propagates further from the pixelet that drove the sub-image. Therefore, the fixed distance 166 will be one component of how large the magnification of the sub-images is. In one embodiment, fixed distance 166 is 2 mm. In one embodiment, each sub-image generated by pixelets 121-126 is magnified by 1.5x. In some embodiments each sub-image generated by each pixelets 121-126 is magnified by 1.05-1.25x. The offset by fixed distance 166 may be achieved by using a transparent intermediary (e.g. glass or plastic layers). In one embodiment, screen layer 110 is fabricated of a matte material suitable for rear projection that is coated onto a transparent substrate that provides the offset by fixed distance 166.
- a transparent intermediary e.g. glass or plastic layers.
- Screen layer 110 is opposite a viewing side 112 of screen layer 110.
- Screen layer 110 may be made of a diffusion screen that presents the unified image on the viewing side 112 of screen layer 110 by scattering the display light in the divergent projection beams 147 (that includes the sub-images) from each of the pixelets 121-126.
- Screen layer 110 may be similar to those used in rear-projection systems.
- FIG. 2 shows a semi-transparent plan view of display apparatus 101 looking through screen layer 110 to display layer 120, in accordance with an embodiment of the disclosure.
- FIG. 2 shows how the display apparatus can generate a unified image 193 using the magnified sub-images 192 generated by light sources 131-136 and their corresponding pixelets 121-126.
- pixelet 124 generates a sub-image 191 that is projected (using the display light in the divergent projection beam 147 from light source 134) on screen layer 110 as magnified sub-image 192.
- each pixelet 121, 122, 123, 125, and 126 can also project a magnified sub-image onto the screen layer 110 that is the same size as magnified sub-image 192.
- Those five magnified sub-images combined with magnified sub-image 192 combine to form unified image 193.
- FIG. 2 shows that the magnified sub-images on the backside of the screen layer 110 combine laterally to form unified image 193.
- the magnification of the sub-images allows the unified image to reach the edge of screen layer 110, while display layer 120 and illumination layer 130 may still include a mechanical bezel that offers rigidity and support for electrical connections that is out of sight to a viewer of display apparatus 101.
- the magnified sub-images would each be the same size and be square- shaped.
- display layer 120 and its pixelets 121- 126 may be offset from light sources 131-136 by a fixed dimension 165 (as shown in FIG. 1).
- dimension 165 is 8 mm.
- FIGs. 1A - 1C do not illustrate intervening layers between the layers 110, 120, and 130, it should be appreciated that embodiments may include various intervening optical and structural layers, such as lens arrays, optical offsets, and transparent substrates to provide mechanical rigidity.
- FIG. 3 shows display apparatus 101 and 301 tiled together to form a tiled display 300, in accordance with an embodiment of the disclosure.
- Tiled display 300 displays an overall- image that is a combination of a unified image (e.g. unified image 193) projected by display apparatus 101 and a unified image projected by display apparatus 301.
- display apparatus 301 is substantially the same as display apparatus 101 although different reference numbers are used for discussion purposes. It is understood that display apparatus 101 can be tiled together with other display apparatuses in a modular approach to building tiled display 300.
- a self-healing adhesive is applied between screen layer 110 and screen layer 310. This adhesive will blend screen layer 110 and screen layer 310 to hide easily perceived seams between screen layers 110 and 310 in tiled display 300.
- the self- healing adhesive is made of polymers.
- a monolithic screen layer is disposed over display layer 120 and 320 so that the screen layer does not have a seam.
- Monolithic screen layers with appropriate mechanical fixtures may be sized to common tiled arrangements of multiple display apparatus 101 (e.g. 2 x 2, 3 x 3, 4 x 4).
- dimension 167 is the same distance as dimension 162. This maintains the pitch between the pixelets 126 and 324, as illustrated. Therefore, the edge of the magnified sub-image generated by light source 334 and pixelet 324 geometrically aligns with the edge of the magnified sub-image generated by light source 136 and pixelet 126. Similarly, the edge of the magnified sub-image generated by light source 331 and pixelet 321 geometrically aligns with the edge of the magnified sub-image generated by light source 133 and pixelet 123. In this way, the unified image projected on screen layer 310 aligns with the unified image projected on screen layer 110 as the overall-image displayed by tiled display 300.
- tiled display 300 may have an unperceivable seam because of the near-seamless visual integration of the unified images as the overall-image on tiled display 300.
- a third and fourth display apparatus that are the same as display apparatus 101 could be added to tiled display 300 to form a larger tiled display that is a 2 x 2 matrix of display apparatus 101 and that the larger display could have the same potential advantages as explained in association with tiled display 300.
- displays larger than a 2 x 2 matrix may also be formed.
- mechanical structures may be added to each display apparatus 101 to facilitate the correct physical alignment of additional display apparatus.
- electrical connectors that facilitate power and image signals are included in display apparatus 101 to facilitate modular construction of a tiled display using the display apparatus 101.
- ASIC application specific integrated circuit
- a tangible non-transitory machine-readable storage medium includes any mechanism that provides (i.e., stores) information in a form accessible by a machine (e.g., a computer, network device, personal digital assistant, manufacturing tool, any device with a set of one or more processors, etc.).
- a machine-readable storage medium includes recordable/non-recordable media (e.g., read only memory (ROM), random access memory (RAM), magnetic disk storage media, optical storage media, flash memory devices, etc.).
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201361856458P | 2013-07-19 | 2013-07-19 | |
US14/144,998 US20150022727A1 (en) | 2013-07-19 | 2013-12-31 | Tileable display apparatus |
PCT/US2014/042708 WO2015009381A1 (en) | 2013-07-19 | 2014-06-17 | Tileable display apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3022729A1 true EP3022729A1 (en) | 2016-05-25 |
EP3022729A4 EP3022729A4 (en) | 2017-03-01 |
Family
ID=52343318
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14826645.5A Withdrawn EP3022729A4 (en) | 2013-07-19 | 2014-06-17 | Tileable display apparatus |
Country Status (5)
Country | Link |
---|---|
US (1) | US20150022727A1 (en) |
EP (1) | EP3022729A4 (en) |
CN (1) | CN105393294A (en) |
TW (1) | TW201506868A (en) |
WO (1) | WO2015009381A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
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US20150022754A1 (en) | 2013-07-19 | 2015-01-22 | Google Inc. | Configurations for tileable display apparatus with multiple pixel arrays |
US9336729B2 (en) | 2013-07-19 | 2016-05-10 | Google Inc. | Optical configurations in a tileable display apparatus |
US9412336B2 (en) | 2013-10-07 | 2016-08-09 | Google Inc. | Dynamic backlight control for spatially independent display regions |
US9368070B2 (en) | 2013-10-07 | 2016-06-14 | Google Inc. | Variable resolution seamless tileable display |
US9803833B2 (en) | 2013-12-03 | 2017-10-31 | X Development Llc | Multi-aperture illumination layer for tileable display |
DE102016109078A1 (en) | 2016-05-18 | 2017-11-23 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | electronics assembly |
CN109143683A (en) * | 2018-09-26 | 2019-01-04 | 深圳市华星光电半导体显示技术有限公司 | A kind of display device |
US20200096819A1 (en) * | 2018-09-26 | 2020-03-26 | Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Display device |
CN113888988B (en) * | 2021-09-10 | 2023-08-11 | 中通服慧展科技有限公司 | Intelligent regulation and control frame connection system for multi-screen splicing |
CN115032808B (en) * | 2022-07-04 | 2023-09-01 | 杭州大昱光电科技有限公司 | 3D display method of large-size liquid crystal spliced screen |
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US6693684B2 (en) * | 1999-09-15 | 2004-02-17 | Rainbow Displays, Inc. | Construction of large, robust, monolithic and monolithic-like, AMLCD displays with wide view angle |
GB9930529D0 (en) * | 1999-12-23 | 2000-02-16 | Screen Tech Ltd | Optical arrangement for flat-panel displays |
US20030184703A1 (en) * | 2000-01-21 | 2003-10-02 | Greene Raymond G. | Construction of large, robust, monolithic and monolithic-like, AMLCD displays with wide view angle |
US6727864B1 (en) * | 2000-07-13 | 2004-04-27 | Honeywell International Inc. | Method and apparatus for an optical function generator for seamless tiled displays |
US7145611B2 (en) * | 2000-12-22 | 2006-12-05 | Honeywell International, Inc. | Seamless tiled display system |
US7180478B2 (en) * | 2001-03-14 | 2007-02-20 | Sanyo Electric Co., Ltd. | Three-dimensional video display and method for creating supply video supplied to three-dimensional video display |
GB2373620B (en) * | 2001-03-21 | 2005-05-18 | Univ Cambridge Tech | Light source arrangement for displays |
EP1618549A4 (en) * | 2003-04-25 | 2006-06-21 | Visioneered Image Systems Inc | Led illumination source/display with individual led brightness monitoring capability and calibration method |
KR101123072B1 (en) * | 2004-11-04 | 2012-03-05 | 엘지디스플레이 주식회사 | Tiled Display Using the Liquid Crystal Display Device |
US20090278121A1 (en) * | 2008-05-08 | 2009-11-12 | Tpo Displays Corp. | System for displaying images and fabrication method thereof |
US8493284B2 (en) * | 2009-04-16 | 2013-07-23 | Prysm, Inc. | Composite screens formed by tiled light-emitting screens |
US7988338B2 (en) * | 2009-04-21 | 2011-08-02 | Mig Technology Inc. | Optical transformation device |
US20110298763A1 (en) * | 2010-06-07 | 2011-12-08 | Amit Mahajan | Neighborhood brightness matching for uniformity in a tiled display screen |
DE102011077142B4 (en) * | 2010-06-07 | 2013-09-05 | Prysm, Inc. | Neighborhood brightness adjustment for uniformity in a tiled display screen |
WO2013059494A1 (en) * | 2011-10-18 | 2013-04-25 | Reald Inc. | Electronic display tiling apparatus and method thereof |
-
2013
- 2013-12-31 US US14/144,998 patent/US20150022727A1/en not_active Abandoned
-
2014
- 2014-06-17 WO PCT/US2014/042708 patent/WO2015009381A1/en active Application Filing
- 2014-06-17 EP EP14826645.5A patent/EP3022729A4/en not_active Withdrawn
- 2014-06-17 CN CN201480041030.5A patent/CN105393294A/en active Pending
- 2014-07-01 TW TW103122688A patent/TW201506868A/en unknown
Non-Patent Citations (1)
Title |
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See references of WO2015009381A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP3022729A4 (en) | 2017-03-01 |
US20150022727A1 (en) | 2015-01-22 |
TW201506868A (en) | 2015-02-16 |
CN105393294A (en) | 2016-03-09 |
WO2015009381A1 (en) | 2015-01-22 |
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